Commit b2fdc257 authored Feb 11, 2016 by Andrey Smetanin Committed by Paolo Bonzini Feb 16, 2016

kvm/x86: Reject Hyper-V hypercall continuation



Currently we do not support Hyper-V hypercall continuation
so reject it.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 0d9c055e

arch/x86/kvm/hyperv.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1083,6 +1083,12 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)

		trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);

		/* Hypercall continuation is not supported yet */
		if (rep_cnt \|\| rep_idx) {
		res = HV_STATUS_INVALID_HYPERCALL_CODE;
		goto set_result;
		}

		switch (code) {
		case HVCALL_NOTIFY_LONG_SPIN_WAIT:
		kvm_vcpu_on_spin(vcpu);
		@@ -1092,6 +1098,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
		break;
		}

		set_result:
		ret = res \| (((u64)rep_done & 0xfff) << 32);
		if (longmode) {
		kvm_register_write(vcpu, VCPU_REGS_RAX, ret);